<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>指定字符之间的空间</title>
    <!--这个例子演示了如何增加或减少字符之间的空间。-->
    <style>
        h1 {letter-spacing: 2px;}
        h2 {letter-spacing: -3px;}
    </style>
</head>
<body>
<h1>This is heading 1</h1>
<h2>This is heading 2</h2>
</body>
</html>